So as a mod there are two different ways I can make a tag synonym; I can suggest it and it goes through voting like normal, or I can just make the dang thing myself immediately without voting.
I accidentally suggested a synonym instead of making one outright (because the UI for doing this is spread across like 5 pages). I then tried to just go to the mod tool to create the tag synonym directly, but for this error:
In the end I had to go to the tag synonyms page and click an approve button. No, I couldn't approve it from the page I created the synonym on either. So that's three pages I went and acted on just to do one thing. Could you please just forgo the "Synonym was already proposed" error and just quietly turn that into an "approve this tag synonym"? They mean the exact same thing and have the same ends, the way it works is just awkward and frustrating.